Lock for an extension pole



FIG. 1 is a side elevational view of a lock for an extension pole showing my new design, the opposite side being a mirror image of that shown;

FIG. 2 is an end elevational view thereof;

FIG. 3 is an opposite end elevational view thereof;

FIG. 4 is a top plan view thereof; and

FIG. 5 is a top perspective view thereof.

The broken-line showing of portions of an extension pole in the views is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a lock for an extension pole, as shown and described. 